code: def possible_cloud_locations(cloud: str) -> Set[str]:
      if cloud == "azure":
          azure_config = get_azure_config()
          return {azure_config.region}
      assert cloud == "gcp"
      gcp_config = get_gcp_config()
      return gcp_config.regions
  
file_path: hail/batch/batch/cloud/utils.py
imports: import os
  from typing import Any, Dict, Set
  from gear.cloud_config import get_azure_config, get_gcp_config
  from hailtop.aiocloud.aioazure import AzureAsyncFS
  from hailtop.aiocloud.aiogoogle import GoogleStorageAsyncFS
  from ..instance_config import InstanceConfig
  from .azure.instance_config import AzureSlimInstanceConfig
  from .gcp.instance_config import GCPSlimInstanceConfig
label_desc: Use image node_id 2 for calling a global function with example usage: possible_cloud_locations(cloud) and returns: gcp_config, unknown